The dwarf planet’s heart-shaped region is actually a whole lot of ice sitting at the bottom of a basin almost 2 miles deep in the Tombaugh Regio, which was named for astronomer Clyde Tombaugh, who discovered Pluto in 1930.

“With our model, we also predict that atmospheric pressure is currently at its seasonal peak and will decrease in the next decades, while seasonal methane frosts will disappear,” Bertrand told ResearchGate.

That change could cause the heart-like feature to act like a real heart.

“The half-heart glacier lying inside is a really massive glacier, which is not impacted by the seasonal changes. It probably formed when the basin formed, and will remain there in the future,” Bertrand told Gizmodo. “However, it probably flows and retracts over a few hundreds of kilometers (like a heart beating) with time, eroding and shaping the mountains surrounding it.”